CONTENTS. xi 



CHAP. PAGE 



XXXV. THE MOUSE-EAR EVERLASTING Antennaria. Stolons. 

 Dio3cious plants. Heads of florets. Receptacle. In- 

 volucre. Pappus clubby. Cypsela 137 



XXXVI. ROBIN'S PLANTAIN Erigeron. Heads radiate. Florets 



of the ray. Florets of the disk. Ligul ate corolla. . 140 



XXXVII. THE DANDELION Taraxacum. Runcinate leaves. Ra- 

 diant, homogamous heads. Chaff. Syngenecious 

 anthers. The order COMPOSITE. Chickory, Camo- 

 mile, Aster. Chrysanthemum. Solidago 143 



XXXVIII. THE CHECKERBERRY Gaultheria. Urceolate corolla. 



Curious fruit. The Black Checkerberry 147 



XXXIX. THE PYROLAS. Anthers inverted in bud ; opening by 



pores. The six species 150 



XL. PRINCE'S PINE Chimaphila. Horned anthers 152 



XLI. THE KALMIAS. Elastic stamens. Pollenization. The 

 order ERICACEAE. The Heaths. Blueberries. Cranber- 

 ries. Azalias. May-flower 155 



XLII. THE PITCHER PLANT Sarracenia. Ascidia. Order SAR- 



RACENIACE^E. Carnivorous Plants. Venus' Flytrap . . 158 

 XLIII. THE AMERICAN COWSLIP Dodecathron. Opposing 



stamens. Dimorphism. Free central placenta 161 



XLIV. CHICK WINTERGREEN Trientalis. 7-parted flowers ... 164 

 XLV. THE LOOSESTRIFES Lysimachia. Verticillate leaves. 

 Monadelphous stamens. Opposing stamens explained. 

 Order PRIMULACE^E. Cyclamen. Anagallis. Primrose. 165 

 XL VI. THE SPEEDWELLS Veronica. Why so called. A two- 

 celled capsule. Exserted stamens. The species .... 170 

 XL VII. TOAD FLAX Linaria. Pentamerous flowers. Personate 

 corolla. The spur, what can reach its honey. Order 



SCROPHULACE^E. Digitalis. Pentstemon 173 



XL VIII. THE GROUND IVY Nepeta. Naturalized plants. Bi- 

 labiate corolla. Halved anthers. Seeds apparently 



naked. The Catmint 176 



XLIX. BLUE CURLS Brunella. Cuspidate bracts. Hairs jointed. 

 The lip a doorstep for bees. Order LABIATE. Pep- 

 permint. Oil of Spike. Lavender 179 



L. THE MORNING GLORY Ipomcea. Ephemeral flowers. 

 Supervolute aestivation. The disk. Use of pollen ; 

 nectar. Septifragal dehiscence. Albumen. Vital- 

 ity of seed. The bud. CONVOLVULACE^E 182 



LI. ROCK MAPLE Acer. Tree picturesque. Theory of leaf- 



f orms. Autumnal colors. Maple sugar. Other Maples. 188 



LII. THE HORSE CHESTNUT JEsculus. History. Phyllo- 

 taxy. Digitate leaves. Suppression of ovules. The 



SAPINDACE.E. The Soapberry tree 192 



LIII. THE SILK GRASS Asclepias. Pollinia. Corona, hoods 

 and horns. Cross-fertilization. The ASCLEPIADACE^E. 

 The Cow tree. Carrionflower 195 



